早教吧 育儿知识 作业答案 考试题库 百科 知识分享
早教吧考试题库频道 --> 学历类考试 -->高中 -->

In our class, when the bell rang and the teacher closed his book, it was a___________

题目

In our class, when the bell rang and the teacher closed his book, it was a

___________ for everyone to stand up.

A. signal B. chance C. mark D. measure

参考答案
正确答案:A